Pawl and ratchet.



No. 669,986. Patented Mar. I9, lam.

' n. w. GORE.

PAWL AND RATCHET.

(Application filed Mar. 16, 1900.)

(lo Model.)

Ill.

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FFIQE.

PATENT DANIEL W. GORE, OF OAYUTA, NEIV YORK.

P AWL AN D RATCH ET.

SPECIFICATION forming part of Letters Patent No. 9,986, dated March 19,1901.

Application filed March 16, 1900. Serial No. 8,928. KNo model.)

1'0 ttZZ whom, it may concern:

Be it known that I, DANIEL W. GORE, acitizen of the United States,residing at Cayuta, in the county of Schuyler and State of New York,have invented certain new and useful Improvements in Pawls and Ratohets,of which the following is a specification.

This invention relates to new and useful improvements in pawls andratchets; and its primary object is to provide a pawl adapted to beoperated by frictional contact with a wheel or disk movable with theratchet.

To these ends the invention consists in the novel construction andcombination of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, showing the preferred form ofmy invention, and in which- Figure 1 is an elevation thereof. Fig. 2 isa section on line to as, Fig. 1. Fig. 3 is a detail view of the pawl.Fig. 4 is a detail view of the modified form of pawl, and Fig. 5 is asimilar view of another modification.

Referring to said figures by numerals of reference, 1 is a ratchethaving teeth adapted to mesh with teeth of a cog 2, having a pawl 3mounted thereon. This pawl is adapted to engage at one end with aratchet 1, its opposite end being forked, as at 4, and sprung upon thecog 2. The ends of the prongs of the forked portion are provided withopenings 5 for the reception of the shaft 6, which is secured to saidcog, but revoluble within the fork of the pawl.

Secured at a suitable point above the pawl is a stop 7, for the purposehereinafter described.

In operation when the ratchet-wheel is revolved in the direction of thearrow, Fig. 1, the cog 2 will be moved therewith in the direction of thearrow thereon, carrying the pawl by reason of its frictional contacttherewith down into engagement with the teeth of said ratchet, stoppingthe revolution of the ratchet. When motion is reversed, the pawl will becarried out of engagement with the ratchet and thrown against the stop7, which prevents its further movement in that direction. The cog,however, can continue to revolve, turning within the fork 4.

While I have shown and described the pawl mounted upon a cog, I do notlimit myself thereto, as a disk may be substituted therefor and moved byfrictional contact with the disk upon the shaft of the ratchet-wheel, ora belt or chain connection may be used between the ratchet and pawlcarrying disk, the; nor is it necessary to employ a pawl of thespecificconstruction shown in Figs. 1, 2, and 3, as a modified form, such asshown in Fig. 4:, may be substituted therefor. In this figure the pawl 8is loosely mounted upon the disk-shaft at one side thereof, and aspringprong 9 is detachably secured thereto and is adapted to bear uponthe opposite face of the disk. This construction has the advantage overthat hereinbefore described in that the spring may be readily replacedwhen worn or broken.

In Fig. 5 I have illustrated a modification which employs a shoe 10,adapted to bear against the edge of the disk and having aspringencircled stem 11, which is slidably mounted in a recess 12,formed within the pawl 13.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am awarethatmodifications may be made therein without departing from the spirit orsacrificing the advantages thereof, and I therefore reserve the right tomake such changes as fairly fall within the scope of my invention.

spring within the recess for holding the stem normally projected; a shoeupon said stem adapted to normally bear upon the edge of the disk; and afixed stop for the pawl, said disk movable independently of the pawlwhen the same is stationary and out of engagement with the ratchet.

2. In a pawl-and-ratchet mechanism, the

combination with a ratchet; of a shaft, a disk mounted thereon, saidratchet and disk being adapted to move in unison, a pawl loosely mountedupon the shaft of the disk and in frictional contact with said disk, anda stop for limiting the movement of the pawl, said pawl being adapted toswing downward with the disk into engagement with the ratchet and upwardinto contact with the stop.

3. In a pawl-and-ratchet mechanism, the combination with aratchet-wheel; of a gear meshing therewith, a shaft to said gear, a

